Self-Powered Wireless Doorbell, Cordless Plug in Door Bells with 2 Receivers, IP44 Waterproof Door Chime Bell, 45 Ringtones, 500-1000ft Range, No Battery Required

When using battery-operated doorbells, we have to check the battery every day.
Consider the case when the battery gets discharged. And if you are not conscious of this fact, a visitor might press the bell button as much as he can, but you still won't hear the sound, as the doorbell is dead. Then visitors would leave your premise unattended with a guess that the house is empty. The result i...